If you want to learn how to build your own business, write better cover letters, learn how to code, or just learn something new, Skillshare has courses on virtually every topic you could think of.

It's free to sign up, but if you want to access every course, you'll have to upgrade to a premium membership, which costs about $12 a month. Sign up right now, though, and only pay $0.99 for your first three months.

The Roomba is the kind of product that makes us feel grateful to live in the 21st century. You can program it to vacuum your place seven times a week, which means that you can leave for work with a messy floor and come back to a clean one.

If you're wary of buying anything refurbished, Amazon does a good job of countering those qualms. Each certified-refurbished product has a minimum 90-day warranty, which should be enough to test the Roomba out.

It's one of those products that's always in high demand and rarely goes on sale. So if you're looking to buy one, this is a pretty great deal.

Portable chargers are among the most convenient and worthwhile purchases in the digital age. Whether you're at the airport and don't want to sit next to a trash bin for an outlet, or you're edging up on a deadline somewhere remote, it's important to have backup. Just use the code "AIRPOWER2" at checkout and 30% will be applied.

Disclosure: This post is brought to you by Business Insider's Insider Picks team. We aim to highlight products and services you might find interesting, and if you buy them, we get a small share of the revenue from the sale from our commerce partners, including Amazon. Jeff Bezos, CEO of Amazon, is an investor in Business Insider through his personal investment company Bezos Expeditions. We frequently receive products free of charge from manufacturers to test. This does not drive our decision as to whether or not a product is featured or recommended. We operate independently from our advertising sales team. We welcome your feedback. Have something you think we should know about? Email us at insiderpicks@businessinsider.com.